Context-dependent conflicting selection on flowering phenology.

IF 3.8 1区 生物学 Q1 BIOLOGY
Yun Wu, Yongpeng Cha, Sha Shuang, Guangli Liu, Nina Sletvold
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引用次数: 0

Abstract

Climate change will affect precipitation and water availability in natural plant populations, potentially influencing phenology, fitness and natural selection. To examine how water availability affects non-pollinator- and pollinator-mediated selection on flowering phenology in Primula tibetica, we manipulated pollination at three sites that differed in soil water content (low, medium and high) in a single common garden. We detected conflicting selections on phenology. At low water content, there was pollinator-mediated selection for earlier flowering start and non-pollinator-mediated selection for later start. At medium water content, pollinators selected for shorter flowering duration and non-pollinator agents for longer duration. The opposing selection resulted in no statistically significant net selection on phenology. Non-pollinator-mediated selection differed between sites, and changes in trait-fitness relationships among hand-pollinated plants were mainly driving variation in selection on phenology. The results indicate that soil water content primarily affects selection on phenology via resource uptake, and are consistent with higher pollinator abundance or constancy early in the flowering season. The study highlights that both flowering start and duration can be targets of selection, that phenology may be subject to conflicting selection from pollinators and other agents, and that the evolution of flowering time in response to pollinator-mediated selection can be constrained by climate.

花期物候的环境依赖性冲突选择。
气候变化将影响自然植物种群的降水和水分有效性,潜在地影响物候、适应性和自然选择。为了研究水分有效性如何影响非传粉媒介和传粉媒介对西藏报春花开花物候的选择,我们在一个普通花园中三个不同土壤含水量(低、中、高)的地点进行了授粉操作。我们在物候学上发现了相互矛盾的选择。在低含水量条件下,传粉媒介选择提前开花,非传粉媒介选择晚开花。在中等含水量条件下,传粉媒介选择花期较短,非传粉媒介选择花期较长。相反选择对物候的净选择无统计学意义。非传粉媒介的选择在不同地点之间存在差异,手传粉植物性状适合度关系的变化主要驱动物候选择的变化。结果表明,土壤含水量主要通过资源吸收影响物候选择,与花期前期传粉媒介丰度或稳定性较高一致。该研究强调,开花开始和持续时间都可以成为选择的目标,物候学可能受到传粉媒介和其他媒介相互冲突的选择的影响,并且开花时间的进化响应传粉媒介的选择可能受到气候的限制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
7.90
自引率
4.30%
发文量
502
审稿时长
1 months
期刊介绍: Proceedings B is the Royal Society’s flagship biological research journal, accepting original articles and reviews of outstanding scientific importance and broad general interest. The main criteria for acceptance are that a study is novel, and has general significance to biologists. Articles published cover a wide range of areas within the biological sciences, many have relevance to organisms and the environments in which they live. The scope includes, but is not limited to, ecology, evolution, behavior, health and disease epidemiology, neuroscience and cognition, behavioral genetics, development, biomechanics, paleontology, comparative biology, molecular ecology and evolution, and global change biology.
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